diff --git a/source/runbooks/creating-accounts-for-end-users.html.md.erb b/source/runbooks/creating-accounts-for-end-users.html.md.erb
index 2269457e5..6ba1c225e 100644
--- a/source/runbooks/creating-accounts-for-end-users.html.md.erb
+++ b/source/runbooks/creating-accounts-for-end-users.html.md.erb
@@ -78,6 +78,11 @@ In this example, only the `modernisation-platform` team can approve the Github a
 
 See [#6338](https://github.com/ministryofjustice/modernisation-platform/pull/6338) for an example of the change required.
 
+In a recent update to the JSON environment file we have added a new tag called critical-national-infastructure, this tag exists to help us report on 
+vital applications and infrastructure to the ministry of justice. This is a boolean input and the default is always false but if your application is critical then this should be set to true.
+
+See [#8191](https://github.com/ministryofjustice/modernisation-platform/commit/58c7fc263920cfbae45150546488815e8c57869e) for an example of the change required.
+
 #### 2. Update the `expected.rego`
 
 Update the [`policies/environments/expected.rego`](https://github.com/ministryofjustice/modernisation-platform/blob/main/policies/environments/expected.rego) file with the newly added application name.